Chimney-cap



(No Model.) 2 sheets-shea 1..

R. H. CRAIGHILL.

GHIMNBY GAP.

Patented Aug. 19, 1884.

Fig. 3.

Fig. 4.

Witnesses. @@M

Inventor. aux

N. PEIZRS. PnotvLnhognpMr. washington. n.6,

Y (No Model.) 2 Sheets-Silleet 2.

' R. H. CR'AIGHILL.

GHIMNEY GAP. y No. 303,623. f Patented Aug. 19, 1884.

i York,

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ROBERT H. CRAIGIIILL, OF BUFFALO, NEW YORK.

CHIMNEY-CAP.

PEIFICATION forming part of Letters Patent No. 303,623, dated August 19, 1884.

Application filed November 30, 1883. (No model.)

I0 a/ZZ whom it may concern.- g

le it known that I, Renner H. Gniricnrm., a citizen ofthe United States, residing in But'- falo, in the county of Erie and State of New have invented certain new and useful Improven'ients in` Chimney-Gaps, of which the following is a specification.

My invention relates to certain improve ments in chimney-caps` its object being to prevent the sinooring of the chimneys or smokestaeks, all of which will be fully and clearly hereinafter shown by reference to the accompanying drawings, in whicli p Figure 1 is a side elevation. Fig. 2 is a detached perspective view of one of the vanos,

is provided with a transverse'strip of metal,

l c", firmly secured in place by rivets in the usual way. This strip is shown in Fig. 7. The

joint of pipe c is also provided with transverse strips e. c, similar to that shown at ai to which the vertical rod c is rigidly fixed in the center of the pipe. The cross-piece a is i perforatethso that the rod c3 will pass through it. There is a small hole through the top of the cap in a line with the hole in the piece a4. Through these openings the rod cipasses as the cap is put into place. The yoke c (which is iirml y iixed to the top ofthe cap by rivets) rests ou top of the rod c, and is secured in place by a nut, e. In this way the cap rests and is firmly showing its forni and construction. Fig.,3is secured in place7 vso as to be turned easily an inside face view of the saine. Fig. 4 is a by the wind. lt will be noticed that the cap will only turn in one direction, (the direction top view of thecap. Fig. 5 is a top view of shown by the arrow in Fig. 4.) It makes no the pipe, showing all that" portion below the 6 is a bottom or inside 2o cap or cowl. Fig. l difference whether the wind comes down ver- 55 view of the cap7 and Fig. 7 is a sectional eletically or from any other point. vation of the cap and pipe complete. I claim as my invention The cap (L is composed of the curved strips l A chimney cap consisting of the curved or vanes c. Each strip c is provided with l portions c', having the inclined portions a?, 25 the inclined portions The object of inelinand arim, c, provided with a transverse piece, 6o

a", in combination with the pipe c having the transverse pieces c ci and fixed vertical rod c, the whole combined and secured together vsubstantially as and for the purposes deing'those portions, as shown, is when a eurrent of air blows directly down it will strike them and cause the cap to turn rapidly in the direction of the arrow shown in Fig` et. This,

3o it will be readily seen7 will cause an upward scribed.

draft through the chimney as the vanes or strips a will catch the air and throw it outhQLERP H' GRAGHILL ward, and thereby cause a partial vacuum i Titnessesz J. M. CALDWELL, JAMES Srncsfrnn.

within and produce an upward draft. 35 To the cap is attached a rim7 c3, which rini 

